NEX-4592 race condition allows FC initiator LUN offline hotplug handler deadlocks with FMA faulting leaf vdev between LDI and ZFS
Reviewed by: Rob Gittins <rob.gittins@nexenta.com>

@@ -60,10 +60,12 @@
 
 /*
  * Flag for LDI handle's lh_flags field
  */
 #define LH_FLAGS_NOTIFY 0x0001          /* invoked in context of a notify */
+#define LH_FLAGS_NOTIFY_NOTIFY 0x0002   /* processed once in notify loop */
+#define LH_FLAGS_NOTIFY_FINALIZE 0x0004 /* processed once in finalize loop */
 
 /*
  * LDI initialization function
  */
 void ldi_init(void);